meandmycousinmagic
01.08.2019 •
Mathematics
112=7x+7(-4x-17) so i need with this and a worksheet that relates to these types of problems i got a 10% on it
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Ответ:
multiply the 7 by everything in parentheses
112=7x+(7*-4x)+(7*-17)
Positive multiplied by a negative is negative
112=7x-28x-119
combine like terms
112= -21x-119
add 119 to both sides
231= -21x
divide both sides by -21
-11= x
Check:
Substitute answer in equation
112= 7x + 7(-4x-17)
112= 7(-11)+7[(-4)(-11)-17]
112= -77 + 7(44-17)
112= -77 + 7(27)
112= -77 + 189
112=112
Hope this helps! :) Good luck with math!!
Ответ:
StatementReason
AB and BC are congruent
CPCTC
DB and FB are congruent
CPCTC
Angle EBD congruent to angle EFB
CPCTC
Angle ABD congruent to angle EBD
Alternate angle theorem
Angle FBC congruent to angle EFB
Alternate angle theorem
ABD CBF
SAS theorem